Two flywheels are pinned to opposite ends of a metal bar. The smaller flywheel has a mass of 40 kg and a radius of 0.25 m. The larger flywheel has a mass of 275 kg and a radius of 1.75 m. The bar has a mass of 2 kg and a length of 3 m. A wooden plate acts as a ripcord by temporarily pressing it against the flywheels and rapidly translating it to the left at v = angular velocity of 25 rad/s and the large flywheel has an angular velocity of 3.5714285714286 rad/s. The flywheel-bar assembly is then set on frictionless ice such that the axes of rotation are perpendicular to the ice surface. 6.25 m/s. The plate is removed when the small flywheel has an 0.05, which eventually causes the flywheels to stop spinning relative The flywheel pins have Hk = to the metal bar. Angular momentum is conserved, so the whole assembly continues spinning as a rigid body about the center of mass. What is the final angular velocity of the assembly? rad/s. The flywheels and bar rotate about their combined center of mass at w- Round answer to 3 significant figures.

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter8: Centroids And Distributed Loads
Section: Chapter Questions
Problem 8.75P
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Two flywheels are pinned to opposite ends of a metal bar. The smaller flywheel has a mass of 40 kg
and a radius of 0.25 m. The larger flywheel has a mass of 275 kg and a radius of 1.75 m. The bar
has a mass of 2 kg and a length of 3 m.
A wooden plate acts as a ripcord by temporarily pressing it against the flywheels and rapidly
translating it to the left at v =
angular velocity of 25 rad/s and the large flywheel has an angular velocity of 3.5714285714286
rad/s. The flywheel-bar assembly is then set on frictionless ice such that the axes of rotation are
perpendicular to the ice surface.
6.25 m/s. The plate is removed when the small flywheel has an
The flywheel pins have Hk = 0.05, which eventually causes the flywheels to stop spinning relative
to the metal bar. Angular momentum is conserved, so the whole assembly continues spinning as a
rigid body about the center of mass. What is the final angular velocity of the assembly?
rad/s.
The flywheels and bar rotate about their combined center of mass at w =
Round answer to 3 significant figures.
Transcribed Image Text:Two flywheels are pinned to opposite ends of a metal bar. The smaller flywheel has a mass of 40 kg and a radius of 0.25 m. The larger flywheel has a mass of 275 kg and a radius of 1.75 m. The bar has a mass of 2 kg and a length of 3 m. A wooden plate acts as a ripcord by temporarily pressing it against the flywheels and rapidly translating it to the left at v = angular velocity of 25 rad/s and the large flywheel has an angular velocity of 3.5714285714286 rad/s. The flywheel-bar assembly is then set on frictionless ice such that the axes of rotation are perpendicular to the ice surface. 6.25 m/s. The plate is removed when the small flywheel has an The flywheel pins have Hk = 0.05, which eventually causes the flywheels to stop spinning relative to the metal bar. Angular momentum is conserved, so the whole assembly continues spinning as a rigid body about the center of mass. What is the final angular velocity of the assembly? rad/s. The flywheels and bar rotate about their combined center of mass at w = Round answer to 3 significant figures.
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